Clustering for individuals of the 126 samples.

<p>(A) The 63 disease samples. (B) The 63 control samples.</p

Receiver operated curves of peaks 10, 12 and 14.

<p>Receiver operated curves of peaks 10, 12 and 14.</p

MALDI-TOF MS spectrum of the peptide profile using C4 resin.

<p>MALDI-TOF MS spectrum of the peptide profile using C4 resin.</p

MALDI-TOF MS spectra of one twin pair's peptide profile using C18 resin.

<p>(A) MALDI-TOF MS spectrum of the twin in the disease group. (B) MALDI-TOF MS spectrum of the twin in the control group.</p

The parameters of database searches with the MASCOT search engine using the GSP Explore software.

<p>The parameters of database searches with the MASCOT search engine using the GSP Explore software.</p

Box-blot of the discriminatory peak signal-intensities.

<p>(A), (B), (C), (D) refer to signal-intensities of peaks1, 2, 4 and 5, respectively.</p

Three-dimensional plot of the principal components of samples and indexes,respectively.

<p>(A) Disease group. (B) Control group. (C) The up-regulated peaks. (D) The down-regulated peaks.</p

MALDI-TOF MS spectra of the discriminatory peaks.

<p>(A) MALDI-TOF MS spectrum of peak1 (861Da) in the disease group. (B) MALDI-TOF MS spectrum of peak1 (861Da) in the control group.</p

Clustering for variables of the 18 discriminatory peaks.

<p>(N1) The 11 up-regulated peaks in the disease group. (N2) The 7 down-regulated peaks in the disease group.</p

The mean intensities of the discriminatory peaks.

<p>*the up-regulated peaks in NAFLD.</p><p>The mean intensities of the discriminatory peaks.</p